Examlex
How do states different from traits?
Placebo
An inert or non-effective substance or treatment given to a participant in a study, used to contrast with an active substance to test its efficacy.
Test
An assessment or examination intended to measure a test-taker's knowledge, skill, aptitude, physical fitness, or classification in many other topics.
Independent Variable
The variable in an experiment that is manipulated to observe its effect on the dependent variable.
Dependent Variable
The variable in an experiment that is affected by manipulation of the independent variable, and is measured or observed by the researcher.
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